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Adds three new MCP tools for managing Gmail labels: - gmail_list_labels: Lists all labels for a user account - gmail_create_label: Creates a new Gmail label - gmail_modify_labels: Adds/removes labels from messages This enables workflows like tagging processed emails with custom labels (e.g. marking emails as triaged by an automation) which was previously not possible with the existing toolset. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
gmail_list_labelstool to list all Gmail labels for a user accountgmail_create_labeltool to create new Gmail labelsgmail_modify_labelstool to add/remove labels from individual messagesThese tools use the existing Gmail API (
users.labels.list,users.labels.create,users.messages.modify) and follow the same patterns as the existing tools.Motivation
The current toolset has no way to tag or categorize emails after reading them. This makes it impossible to build workflows that track which emails have been processed (e.g. marking emails with a custom "Triaged" or automation label to avoid re-processing).
Test plan
gmail_list_labelsreturns all system and user labelsgmail_create_labelcreates a new label and returns its IDgmail_modify_labelsadds a label to a message (verified via Gmail UI)gmail_modify_labelsremoves a label from a messageUNREAD/ removingUNREADlabel works as expected